Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 85, NWS Raleigh, NC

May 22, 2012Chatham County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 22, 2012, 3:48 PM EDT for Chatham County, North Carolina. It was in force for 57 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 22, 2012, 3:48 PM EDT (19:48 UTC)
Expired: May 22, 2012, 4:45 PM EDT
In force: 57 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

County Chatham County, NC

The radar

The Raleigh/Durham radar (KRAX), 71 km from the middle of the area, began a volume at 19:51 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 22, 4:05 PM EDT	HAIL 1	4 N Goldston, NC	DIME TO QUARTER SIZED HAIL... LASTED FOR ABOUT 10 MINUTES

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.8 hours before the alert went out and 78 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 185 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 928 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

131 
WUUS52 KRAH 221948
SVRRAH
NCC037-222045-
/O.NEW.KRAH.SV.W.0085.120522T1948Z-120522T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
348 PM EDT TUE MAY 22 2012

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHATHAM COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 445 PM EDT

* AT 346 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER GOLDSTON...OR 11 MILES SOUTHEAST OF SILER
  CITY...MOVING NORTHEAST AT 10 MPH. QUARTER SIZED HAIL AND WINDS IN
  EXCESS OF 58 MPH ARE LIKELY WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  PITTSBORO...
  GOLDSTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LARGE HAIL WILL DAMAGE VEHICLES...WINDOWS AND SOME ROOFS. SEVERE
WINDS WILL BLOW DOWN TREES...POWER LINES...AND CAN DAMAGE MOBILE
HOMES AND OTHER BUILDINGS. SEEK SHELTER IN A STURDY STRUCTURE UNTIL
THE STORM HAS PASSED. STAY AWAY FROM WINDOWS.

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING...1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW
ENFORCEMENT AGENCY.

&&

LAT...LON 3581 7894 3557 7921 3557 7924 3553 7926
      3553 7928 3554 7929 3555 7928 3555 7930
      3553 7932 3552 7936 3551 7948 3553 7955
      3583 7939
TIME...MOT...LOC 1948Z 221DEG 9KT 3561 7932

$$

77

2 follow-up statements

522 
WWUS52 KRAH 222008
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
408 PM EDT TUE MAY 22 2012

NCC037-222045-
/O.CON.KRAH.SV.W.0085.000000T0000Z-120522T2045Z/
CHATHAM NC-
408 PM EDT TUE MAY 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR CENTRAL CHATHAM COUNTY...

AT 400 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED 9 MILES
SOUTHWEST OF PITTSBORO...MOVING NORTHEAST AT 10 MPH.

HAZARDS IN THE WARNING INCLUDE...
QUARTER SIZED HAIL.
DAMAGING WINDS IN EXCESS OF 58 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE... PITTSBORO... BYNUM AND 
LOCATIONS ALONG US HIGHWAY 64 BETWEEN PITTSBORO AND SILER CITY.

LARGE HAIL WILL DAMAGE VEHICLES...WINDOWS AND SOME ROOFS. SEVERE
WINDS WILL BLOW DOWN TREES...POWER LINES...AND CAN DAMAGE MOBILE
HOMES AND OTHER BUILDINGS. SEEK SHELTER IN A STURDY STRUCTURE UNTIL
THE STORM HAS PASSED. STAY AWAY FROM WINDOWS.

WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 7 7...6 3 3...6 7 7 2.

LAT...LON 3581 7894 3558 7922 3559 7926 3561 7936
      3564 7943 3583 7939
TIME...MOT...LOC 2005Z 221DEG 9KT 3566 7929

$$

77

299 
WWUS52 KRAH 222037
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
437 PM EDT TUE MAY 22 2012

NCC037-222047-
/O.EXP.KRAH.SV.W.0085.000000T0000Z-120522T2045Z/
CHATHAM NC-
437 PM EDT TUE MAY 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CHATHAM COUNTY EXPIRES
AT 445 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS. THUS... THE WARNING WILL BE ALLOWED TO EXPIRE AT 445 PM.

IF YOU OBSERVED SEVERE WEATHER INCLUDING DAMAGING WINDS OR LARGE
HAIL...PLEASE CONTACT THE NATIONAL WEATHER SERVICE BY CALLING TOLL
FREE 1...8 7 7...6 3 3...6 7 7 2...OR NOTIFY YOUR NEAREST LAW
ENFORCEMENT AGENCY AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL
WEATHER SERVICE FORECAST OFFICE IN RALEIGH.


LAT...LON 3581 7894 3558 7922 3559 7926 3561 7936
      3564 7943 3583 7939
TIME...MOT...LOC 2037Z 221DEG 9KT 3572 7923

$$

77

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 22, 12:33 PM EDT	Special Weather Statement	RAH	Sampson	57 min
May 22, 1:22 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Richmond, Scotland	38 min
May 22, 2:14 PM EDT	Special Weather Statement	RAH	Chatham, Cumberland, Davidson, Harnett, Hoke, Lee and 5 more	2 hr
May 22, 2:34 PM EDT	Severe Thunderstorm Warning	RAH	Harnett, Lee	56 min
May 22, 2:51 PM EDT	Severe Thunderstorm Warning	RAH	Montgomery, Randolph	54 min
May 22, 3:05 PM EDT	Special Weather Statement	RAH	Halifax	55 min
May 22, 3:13 PM EDT	Special Weather Statement	RAH	Wilson	62 min
May 22, 3:21 PM EDT	Special Weather Statement	RAH	Harnett	54 min
May 22, 3:22 PM EDT	Special Weather Statement	RAH	Sampson	38 min
May 22, 3:26 PM EDT	Severe Thunderstorm Warning	RAH	Sampson	45 min
May 22, 3:33 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Harnett, Johnston, Sampson	42 min
May 22, 3:47 PM EDT	Severe Thunderstorm Warning	RAH	Sampson, Wayne	43 min
May 22, 4:01 PM EDT	Special Weather Statement	RAH	Edgecombe	59 min
May 22, 4:18 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Sampson	42 min
May 22, 4:24 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland	35 min
May 22, 4:41 PM EDT	Special Weather Statement	RAH	Hoke	49 min
May 22, 4:49 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Sampson, Wayne	56 min
May 22, 5:02 PM EDT	Special Weather Statement	RAH	Durham	58 min
May 22, 5:24 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Granville, Wake	51 min
May 22, 5:27 PM EDT	Special Weather Statement	RAH	Nash	48 min
May 22, 5:31 PM EDT	Special Weather Statement	RAH	Wilson	59 min
May 22, 5:45 PM EDT	Special Weather Statement	RAH	Richmond, Scotland	60 min
May 22, 5:48 PM EDT	Special Weather Statement	RAH	Nash, Wilson	72 min
May 22, 5:51 PM EDT	Special Weather Statement	RAH	Guilford	54 min
May 22, 6:42 PM EDT	Special Weather Statement	RAH	Anson, Stanly	63 min
May 22, 7:04 PM EDT	Special Weather Statement	RAH	Davidson	56 min
May 22, 7:14 PM EDT	Areal Flood Advisory	RAH	Stanly	106 min
May 22, 7:21 PM EDT	Special Weather Statement	RAH	Forsyth	54 min
May 22, 7:29 PM EDT	Special Weather Statement	RAH	Richmond	61 min
May 22, 7:32 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Montgomery, Stanly	28 min
May 22, 7:34 PM EDT	Severe Thunderstorm Warning	RAH	Richmond	27 min
May 22, 7:43 PM EDT	Flash Flood Warning	RAH	Davidson, Stanly	3 hr

Nearby

Severe Thunderstorm Warnings in North Carolina, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.